On Sun, Oct 20, 2013 at 2:37 AM, Austin S Hemmelgarn <ahferro...@gmail.com> wrote: > From: Austin S. Hemmelgarn <ahferro...@gmail.com> > > This patch adds options to specifically optimize for a number of newer 64-bit > microarchitectures; specifically, Intel's Nehalem, Westmere, Ivy Bridge, and > Sandy Bridge, and AMD's Family 10h, Bobcat, Jaguar, Bulldozer, Piledriver, > and Steamroller. This serves primarily as an attempt to render this > particular sub-menu up-to-date with respect to the options offered by current > versions of GCC. > > Signed-Off-By: Austin S. Hemmelgarn <ahferro...@gmail.com> > --- > Based on some testing of MIVYBRIDGE, MAMDFAM10, and MPILEDRIVER (the only > three that I personally have the hardware to test on), most of these should > preform better than GENERIC_CPU on the right hardware, and none of them will > preform any worse than GENERIC_CPU on the correct hardware. Furthermore, > testing of MPILEDRIVER seems to indicate an improvement to energy efficiency > over GENERIC_CPU as it causes the on cpu power sensor to consistently read an > average of 1.5 watts lower under idle load than when using GENERIC_CPU (this > corresponds to about 5% decrease in power consumption on a idle-tickless > system, and about 2% on a non-dynticks system.). In addition, most of the > people who would be likely to use this are almost certainly going to use it > regardless because they either don't care how much of an improvement it > provides, or use Linux on such a large scale that any performance improvement > is significant (i.e. if you have need for 1000 servers to meet load > requirements, then a 1% > performance boost means that you need 10 fewer servers to meet the same load).
While discussion your initial patch Boris had reasonable doubts. Have they all been resolved? > diff -urNp linux/arch/x86/Kconfig.cpu linux-patched/arch/x86/Kconfig.cpu > --- linux/arch/x86/Kconfig.cpu 2013-10-16 16:16:06.722058808 -0400 > +++ linux-patched/arch/x86/Kconfig.cpu 2013-10-16 16:29:38.532078946 -0400 > @@ -158,6 +158,7 @@ config MK8 > bool "Opteron/Athlon64/Hammer/K8" > ---help--- > Select this for an AMD Opteron or Athlon64 Hammer-family processor. > + These processors show a CPU family of 8 in /proc/cpuinfo. > Enables use of some extended instructions, and passes appropriate > optimization flags to GCC. > @@ -269,6 +270,105 @@ config MATOM > accordingly optimized code. Use a recent GCC with specific Atom > support in order to fully benefit from selecting this option. > +config MNEHALEM > + bool "Intel Nehalem/Westmere" > + depends on X86_64 > + ---help--- > + Select this for first and second generation Core i3, i5, and i7 > + processors and other Nehalem or Westmere based processors > + This also includes some Xeon server processors. > + > +config MSANDYBRIDGE > + bool "Intel Sandy Bridge" > + depends on X86_64 > + ---help--- > + Select this for third generation Core i3, i5, and i7 > + processors and other Sandy Bridge based processors > + In addition, this includes some Xeon processors, and many recent > + mobile processors branded as Pentium or Celeron. > + > +config MIVYBRIDGE > + bool "Intel Ivy Bridge" > + depends on X86_64 > + ---help--- > + Select this for fourth generation Core i3, i5, and i7 processors > + and other Ivy Bridge based processors. This also includes some > + Xeon, Pentium, and Celeron processors. > + > +config MAMDFAM10 > + bool "AMD Family 10h (Athlon II, Phenom II, and Opteron)" > + depends on X86_64 > + ---help--- > + Select this for AMD Family 10h processors. > + This includes Athlon II, Phenom II, early third-generation > + Opterons, and a number of other Socket AM2, AM2+, AM3, and > + Socket F processors. CPU's in this series show cpu family > + 16 in /proc/cpuinfo. > + > +config MBOBCAT > + bool "AMD Bobcat (C, E, G, and Z series APU's)" > + depends on X86_64 > + ---help--- > + Select this for AMD C, E, G, and Z series APU's. These are > + ultra low power CPU+GPU combos that are similar to the > + Bulldozer CPU cores, but have a significantly different > + instruction pipeline, and fewer instruction set extensions. > + > +config MJAGUAR > + bool "AMD Jaguar (Newer E and A series APU's)" > + depends on X86_64 > + ---help--- > + Select this for AMD Jaguar based CPU's. These are the successors > + of the Bobcat microarchitecture. CPU's based on this > microarchitecture > + will show a CPU family of 22 in /proc/cpuinfo. > + > +config MBULLDOZER > + bool "AMD Bulldozer (FX and Opteron)" > + depends on X86_64 > + ---help--- > + Select this for AMD Bulldozer microarchitecture processors. > + This includes the following CPUs: > + FX-41x0 > + FX-61x0 > + FX-6200 > + FX-81x0 > + Opteron 32xx > + Opteron 42xx > + Opteron 62xx > + > +config MPILEDRIVER > + bool "AMD Piledriver (FX, APU, and Opteron)" > + depends on X86_64 > + ---help--- > + Select this for AMD Piledriver microarchitecture processors. > + This includes the Following CPUs: > + 'Trinity' APUs > + 'Richland' APUs > + FX-43xx > + FX-63xx > + FX-83xx > + FX-9370 > + FX-9590 > + Opteron 33xx > + Opteron 43xx > + Opteron 63xx > + > +config MSTEAMROLLER > + bool "AMD Steamroller (Kaveri and Berlin APU's)" > + depends on X86_64 > + ---help--- > + Select this for AMD's 'Kaveri' and 'Berlin' APU's. These are the > + next generation of Bulldozer derived processors. > + > config GENERIC_CPU > bool "Generic-x86-64" > depends on X86_64 > @@ -300,7 +400,7 @@ config X86_INTERNODE_CACHE_SHIFT > config X86_L1_CACHE_SHIFT > int > default "7" if MPENTIUM4 || MPSC > - default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 > || X86_GENERIC || GENERIC_CPU > + default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 > || MNEHALEM || MSANDYBRIDGE || MIVYBRIDGE || MAMDFAM10 || MBOBCAT || MJAGUAR > || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || X86_GENERIC || GENERIC_CPU > default "4" if MELAN || M486 || MGEODEGX1 > default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || > MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC > || M586 || MVIAC3_2 || MGEODE_LX > @@ -331,7 +431,7 @@ config X86_ALIGNMENT_16 > config X86_INTEL_USERCOPY > def_bool y > - depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || > M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 > + depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || > M586MMX || MNEHALEM || MSANDYBRIDGE || MIVYBRIDGE || MAMDFAM10 || MBOBCAT || > MJAGUAR || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || X86_GENERIC || MK8 || > MK7 || MEFFICEON || MCORE2 > config X86_USE_PPRO_CHECKSUM > def_bool y > diff -urNp linux/arch/x86/Makefile linux-patched/arch/x86/Makefile > --- linux/arch/x86/Makefile 2013-10-16 16:16:06.738725130 -0400 > +++ linux-patched/arch/x86/Makefile 2013-10-16 17:28:28.200605479 -0400 > @@ -68,6 +68,24 @@ else > $(call cc-option,-march=core2,$(call > cc-option,-mtune=generic)) > cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ > $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) > + cflags-$(CONFIG_MNEHALEM) += $(call cc-option,-marche=corei7) \ > + $(call cc-option,-mtune=corei7,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_SANDYBRIDGE) += $(call cc-option,-march=corei7-avx) \ > + $(call cc-option,-mtune=corei7-avx,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MIVYBRIDGE) += $(call cc-option,-march=core-avx-i) \ > + $(call cc-option,-mtune=core-avx-i,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MAMDFAM10) += $(call cc-option,-march=amdfam10) \ > + $(call cc-option,-mtune=amdfam10,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1) \ > + $(call cc-option,-mtune=btver1,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-match=btver2) \ > + $(call cc-option,-mtune=btver2,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MBULLCOZER) += $(call cc-option,-march=bdver1) \ > + $(call cc-option,-mtune=bdver1,$(call > cc-option,-mtune=generic)) \ > + cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2) \ > + $(call cc-option,-mtune=bdver2,$(call > cc-option,-mtune=generic)) > + cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3) \ > + $(call cc-option,-mtune=bdver3,$(call > cc-option,-mtune=generic)) > cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) > KBUILD_CFLAGS += $(cflags-y) > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
